Growing Degree Days Calculator

The time between your start date and end date cannot exceed 7 months.

Location:(postal code, city & state/prov or address)

Choose your crop or pest:

Start date:(Your planting date)

End date:

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What does GDD mean? Each crop requires exposure to a certain amount of Growing Degree Days (GDDs) or heat units to complete its life-cycle. For some crops, like corn and soybean, one can actually use GDDs to determine where a crop is in its development cycle. This information can be useful for determining when scouting should be done, and it can also allow one to determine when a crop is in an important growth stage.